Diameter of wheel is 3m. The wheel revolves 28 times in a minute. To cover 5.280 km distance, the wheel will take (take pi = 22/7)
If 12 + 22 + 32 ...............+ x2 = x(x + 1) (2x + 1)/6, then 12 + 32 + 52 + ...........+ 192 is equal to
If 3 men or 4 women can plough a field in 43 days, how long will 7 men and 5 women take to a plough it ?
A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work is done by A in
Average age of 6 sons of a family is 8 years. Average age of sons together with their parents is 22 years. If the father is older than the mother by 8 years, the age of mother (in years) is
A grocer has a sale of Rs. 6435, Rs 6927, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500 ?
If the cost price of 50 oranges is equal to the selling price of 40 oranges, than the profit percent is
The area of an equilateral triangle is 400√3 sq.m. its perimeter is
Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is
If a:b = 2/9:1/3, b:c = 2/7:5/14 and d:c = 7/10:3/5 then a:b:c:d is
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